Ready-roofing fabric.



Ji AYRAULT. READY ROO-PING FABRIC.

APPLICATION FILED Dno.29,19oa.

Patented June 15,1909.

Witwe/.maa M attaining I .Specification of Letters Patent.

patented :une 15,1661.

Appliat'ldn ld Ucelbe'r 29, 1908.. Serial No. 489,749.

To all whom it may concern:

Be it known that I, JOHN AYRAULT, ac'itizen of the United States, residing at Tonawanda, in the county of Erie and State 0f New York, have invented certain new and useful Improvements in Read '-Roofing Fabrics; and

do hereby declare t e following to be a full, clear, and exact idescri tion ofthe invention, such as will enable ot ers skilled inl the art to which it appertains to make `and use the same. v y

My invention relates to the production of that class of roofing material, commonly termed ready roong, wherein a suitable fabric, such for instance as a felt, is saturated with bitunjnou's or equivalent waterproofing substance and subsequently vtop dressed with crushed'andscreened quartz, fine sand or the like to produce a weather-proof upper surface. It has been the practice heretofore in the manufacture of this class o'f roofing fabric to produce a multi le ply fabric by passin several sheets of fe t through a kettle or tan of the heated bituminous 'water'- proofing material so as to saturate the felts and give to the same an upper or -outer layer of the bituminous matter l1n which the top dressing of grit or sand is embedded, and an intermediate layer of the bituminous matter whereby the several felts are cemented together, and to apply to the'saturated-u'nder felt as it comes from the tank or kettle a dry bottom felt. The foregoing method has been the common practic'eeven in two ply roofing, the first or upper felt being passed through the tank or kettle and saturated and Y the second or bottom felt 4being added dry as therst felt left the tank or kettle, and this final or dry bottom felt has been found necessary to protect the fabric against puncturefrom gravel, &c. In the manufacture of this class of ready roofing fabrics, attempts have been made, for economy sake, to" dispense with the under or dr felt 'and to substitute therefor a` bottom ressing or lcoating of crushed and screened quartz, fine sand, ulverized soapstone, plumbago, or the like.

he. exterior coatln sof crushed and screened quartz, sand, plum ago, &c., have for their several objects the prevention ofthe crack ing, meltin and running of the bituminous coatings, o the upper or weather surface,V

the prevention of adhesion of the fabric when rolled for transportation, and the ro4 4tection of the under surface of the ab- `ric when applied from'fire, for from fumes and gases likely to cause deterioation'thetecf. Fabrics of this character may be lald swith either side exposed to the weather, and are supposed -to be less liable to creep than fabrics `wherein the under side is an unsantled surface.v Ex erience has shown that` auch surfacing wit grit, soapstone, &c.,wh1ch 1s of a granular character is not fully effective to protect the under side of the fabrlc from' the soft saturated felt is liable to be punctured by the larger particles of the surfacing niateriaL as well as by the rough surfaces' on which the roofing is laid, and soapstone, plumbago and the like substances belng of a felt or protection thereto from suc punctures which will result in causing the roof to leak. Thek object of my present invention 1s the production of a ready roofing fabric provided ter which shall so sheath the felt as to 'protect invention.

cation, and chosen to lustrate thefsame, Figure 1 is a top view showing the sand covered or weather side of a roofingfabric embodying my invention. Fig. 2 is an under side view showing the mica-covered or puncturecand corrosion-resisting side of a roofing fabric embodying. my invention. Fig. 3 is an edge view of a single'felt, or one ply roofing fabric embodyingmy invention. Flg. 4 1s a perspective view of -a multiple (three) ply Fig. is anedge view of the multiple ply fabric sho in Fig. 4.

they occur. f

the same against puncture, or deterioration In the drawing accom anying this specifi- Like sym cls refer to like parts wherever.-

corroding action of acid fumes, gases, &c., i yfrcmwithin the building covered therebv. In lthe case 'of one ply o'r 'single felt fabric', the

granular character afford .no sup ort to the With an under surface of a scale-like characo roon fabric embodying myA invention, and

will now proceed to describe my invention more fully so that others skilled in the art to which it appertains may apply the same.

In the drawings, 17 1 1b indicate the felts employed in manufacturin the ready roofing fabric, 2 indicates the usua or any approved top or Weathersurface coatin of crushed and screened quartz, feldspar, or vline sand, and 3 the under or bottom surface of crushed or ground mica. Any micaceous matter such as muscovite, paragonite, biotite, &c., which has A emerge from the saturating tank the up )er surface of the fabric passes under a suita le supply of crushed and sized feldspar, or lfine Grit, Which'applies the top or weather surface coating, andq over a suitable supply of crushed mica, which istalren. up and adheres to the under side of the fabric giving thereto a scale-like coating to a greater or less degrec. The fabric thus coated on both of lts surfaces ma r, if desired, be assed between presser ro s on its Way to t e reels on which 1t is ultimately spooled for the market.

`Wl1ile the mica coating of the under sur- 1 under surfacing for all ready roofing fabrics,

whether single or multiple ply, it is of especial value for the single ply, as it effectively toughensA and strengthens the fabric as a whole and/guards against punctures either 'from gravel or rough planking, advantages heretofore only derivedby the use of multiple felts, and at greatly increased cost of manufacture.

Having thus described my invention, what I .claim and desire to secure by Letters Patent is:

.1. A roofing fabric comprised of felt saturated with a bituminous i'iller and having one of its surfaces substantially coated with mica scales. f

2. A roofing fabric comprised of felt satu-v rated with a Water-proofing material and havin@ mica scales upon one surface, and granular mineral matter upon the opposite surface.

3. A roofing fabric comprised of a single felt saturated with a waterproofing filler, and lfaving mica scales upon one of its surfaces.

4. A roofing fabric comprised of a single-` felt saturated with a water-proofmg filler, an d havlng mica scales upon one of its surfaces, and granular mineral matter upon the other i of its surfaces.

In testimony whereof I aflix my signature, in presencenof two subscribing witnesses.

'JOHN AYRAULT. Witnesses:

ODELL H. DEAN, A. J. Comms. 

